I found that the ASHRAE clear sky always include the diffuse radiation. I wanted to use customized clear sky which only includes the direct normal radiation, not diffuse horizontal radiation.
Thus, I changed the skymodel.py as below.
(original) diff_horiz = 0.17 * dir_norm * math.sin(math.radians(alt))
(reviesed) diff_horiz = 0
But, when I do simulation with this revised skymodel.py,
the result doesn’t include “sky + diffuse values”.
And the total values doesn’t change although I change the reflectivity of louvers.
How can I make the customized clear sky working with the reflectivity of material?
Thanks for your answers.
ClearSky_Radiation_1.gh (59.0 KB)
skymodel_revised.py (8.1 KB)